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Ruby

Posted by Jon Thomas
Jon Thomas
8,916 Points

Code challenge: Adding States

I can't get passed this code challenge. In step 2 of 3, they say to "Call the "block_mutual_friendship" method after the transition to the blocked state."

This is the code you start with:

class UserFriendship < ActiveRecord::Base
  belongs_to :user
  belongs_to :friend, class_name: 'User', foreign_key: 'friend_id'  

  state_machine :state, initial: :pending do
    state :requested
    state :blocked
  end
end

So, I added this:

after_transition on: :block, do: [:block_mutual_friendship!]

which makes the code look like this:

class UserFriendship < ActiveRecord::Base
  belongs_to :user
  belongs_to :friend, class_name: 'User', foreign_key: 'friend_id'  

  state_machine :state, initial: :pending do
    after_transition on: :block, do: [:block_mutual_friendship!]
    state :requested
    state :blocked
  end
end

But that doesn't work. What am I doing wrong?

4 Answers

Ryan Carson
Ryan Carson
23,287 Points
Ryan Carson
Ryan Carson
23,287 Points

Hey Jon,

Thanks for the heads up. I'll notify Jason about this.

Thanks for being a Treehouse Student!

Ryan

Founder/CEO Treehouse

Jason Seifer
STAFF
Jason Seifer
Treehouse Guest Teacher
Jason Seifer
Jason Seifer
Treehouse Guest Teacher

Hi Jon,

The code challenges don't always strictly repeat what's in the videos. Sorry for the confusion but I'm glad you figured it out!

Jon Thomas
Jon Thomas
8,916 Points
Jon Thomas
Jon Thomas
8,916 Points

I'm starting to learn that. :) Like I mentioned in another forum post, it could be nice for the users to make that clear from the beginning. We defnitely don't necessarily know that when we're new to the site. Thanks guys! Still enjoying myself.

Jon Thomas
Jon Thomas
8,916 Points
Jon Thomas
Jon Thomas
8,916 Points

Grrr. Apparently you have to remove the exclamation point, unlike what we saw in the video.

So adding

after_transition on: :block, do: [:block_mutual_friendship]

Or

after_transition on: :block, do: :block_mutual_friendship

will work.